Rich Snippets or rather structured data are very important regarding exact profiling on Google & Co. Searchengines absolutely want to know whether the qouted product or service are exactly
identifiable or not.
Therefore intelligent HTML-programmers should mention such information by using rich snippets within the code structure of the concerned web file. For example, I want to tell you something
about „China“ on my web site. Normally I use an h1-tag or a p-tag within the HTML-site backend.
But this is not exact enough. Google + Co. do not know whether the concerned article deals about china as product or the state China. Ok, you can describe the first data by using more h-tags or rather p-tags and provide the reader with more information etc.
Professionals, however, use rich snippets. Rich snippets are rich in providing exact information to the used search engine. A simple HTML-structure including structured data could look like this
<div itemscope itemtype=“http://schema.org/Product“>
<meta itemprop=“description“ content=“China“>
<span itemprop=“name“ style=“display:block;“><strong>China</strong></span>
<span itemscope itemtype=“http://schema.org/Brand“ style=“display:block;“><span itemprop=“name“>China</span></span>
You can realize the difference at once. Here is „China“ presented as product! The author of this article wants to tell us something about products made of china and not more. This is a very precise particular.
On the other hand:
is not exact enough. It seems to be a headline written in HTML and not more. China (as state) or China (as product)? That is the question…
It is easier to suppy Google + Co. with the concerned data at once than to write more and more about the theme and post images supporting this etc.
Consequently, please use rich snippets asap.